He'll be playing Tom Hazard, a man who has lived for 400 years, but stopped aging at 41, according to Variety. Cumberbatch starred as the time-bending Marvel title character in last year's "Doctor Strange."

"How to Stop Time" is the first adult novel in four years by Haig, the bestselling author whose children's book include "The Girl Who Saved Christmas" and "A Boy Called Christmas."

"The prospect of Benedict Cumberbatch playing Tom Hazard is a hugely exciting one and I could not be happier," Haig tells the BBC.

Cumberbatch will reprise his role of Stephen Strange in "Thor: Ragnarok" and "Avengers: Infinity War."

He, along with "Thor: Ragnarok" costar Cate Blanchett have been mentioned as contenders to play the next "Doctor Who." We're going to guess that Cumberbatch doesn't (ahem) have time to play a Time Lord.